Multi-stage pressure regulating conversion tap switch

The invention discloses a multi-stage voltage regulation conversion tapping switch, which aims to solve key technology that the multi-stage voltage regulation is added during the conversion of the switch with a plurality of voltage regulation modes such as Y-D conversion, positive and reverse voltage regulation conversion, and coarse and fine voltage regulation conversion. The invention adopts a unique technical proposal that a conversion mechanism 2- with intermittent movement period is adopted, and is in infinite cyclic switching connection with conversion fixed contacts of various related phases of a tap of a coil of a transformer to achieve that the operation law of the conversion mechanism follows the conversion of an alternate and periodic voltage regulation mode and the multi-stagevoltage regulation is performed in a periodic conversion interval. The main use of the switch is that the multi-stage voltage regulation conversion tapping switch is applicable to various same grade transformers with differen